[source] x86: generic: use HIGHMEM64G instead of HIGHMEM4G

[LEDE Commits]

dangole pushed a commit to source.git, branch master:
https://git.lede-project.org/641a65fd062987a456216cc4fa91ff2910528261

commit 641a65fd062987a456216cc4fa91ff2910528261
Author: Daniel Golle <daniel at makrotopia.org>
AuthorDate: Fri May 5 09:51:17 2017 +0200

    x86: generic: use HIGHMEM64G instead of HIGHMEM4G
    
    commit 4b4f73937371 switched on HIGHMEM4G which implicitely disabled
    PAE and hence also NX and other useful and security-relevant features.
    Re-enable PAE by switching to HIGHMEM64G.
    
    Signed-off-by: Daniel Golle <daniel at makrotopia.org>
---
 target/linux/x86/generic/config-default | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/target/linux/x86/generic/config-default b/target/linux/x86/generic/config-default
index c897b47..f879bbd 100644
--- a/target/linux/x86/generic/config-default
+++ b/target/linux/x86/generic/config-default
@@ -175,7 +175,8 @@ CONFIG_HDMI=y
 CONFIG_HIBERNATE_CALLBACKS=y
 CONFIG_HID=y
 CONFIG_HID_BATTERY_STRENGTH=y
-# CONFIG_HIGHMEM64G is not set
+# CONFIG_HIGHMEM4G is not set
+CONFIG_HIGHMEM64G=y
 CONFIG_HOTPLUG_CPU=y
 CONFIG_HPET=y
 CONFIG_HPET_MMAP=y